/Engine/Source/Runtime/Landscape/Public/LandscapeSettings.h
Returns the default landscape layer info object that will be assigned to unset layers when creating a new landscape.
[TSoftObjectPtr](API\Runtime\CoreUObject\UObject\TSoftObjectPtr)< [ULandscapeLayerInfoObject](API\Runtime\Landscape\ULandscapeLayerInfoObject) > GetDefaultLayerInfoObject() const